1N6340US/TR

Overview

The Microchip Technology 1N6340US/TR is a surface-mount Zener voltage regulator in the B-SQ MELF package. It features a nominal Zener voltage of 47.0 V with a standard tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C and dissipates up to 0.5 W at an end cap temperature of 150°C. Key electrical parameters include a maximum reverse current of 10 µA at 25°C, a dynamic impedance of 9.0 Ω at the test current (IZ2), and a surge current rating of 36 A for an 8.3 ms square wave.

Feature Summary

• Hermetically sealed voidless glass construction with internal metallurgical bonds for high reliability.
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020.
• Inherently radiation hard design suitable for demanding environments.

Applications

• High-reliability applications where failure cannot be tolerated.
• Voltage regulation over broad operating current and temperature ranges.
• Military qualified circuits requiring robust surface mount components.

Procurement Notes

Verify the specific ordering suffix to confirm the exact reliability level and RoHS compliance status. The datasheet indicates that JAN, JANTX, JANTXV, and JANS levels are available per MIL-PRF-19500/533. Commercial versions may offer RoHS compliant options. Confirm tape and reel quantities directly with the manufacturer as standard packaging details require factory consultation.

Selection Notes

Select this component for applications requiring a 47 V reference in a compact surface-mount form factor. Ensure the thermal design accounts for the specified junction-to-end cap resistance values, which vary by series subgroup. Verify that the required voltage tolerance aligns with the standard 5% specification or select tighter tolerances via part nomenclature if necessary.

Part Context

This device belongs to the 1N6309US through 1N6355DUS series of 0.5 watt Zener diodes. It serves as the surface-mount equivalent to the JEDEC registered axial-leaded 1N6309 through 1N6355 series. The series offers Zener selections from 2.4 to 200 volts, providing a comprehensive range for various voltage regulation needs in military and industrial sectors.

Replacement Considerations

Direct replacements include other 1N6340 variants such as 1N6340US or 1N6340DUS, provided the package type and reliability level match the system requirements. Cross-reference with other manufacturers' MIL-PRF-19500/533 qualified parts only if pinout and electrical characteristics are identical.